JP2008158093A - Mobile phone with liquid crystal projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile phone with a liquid crystal projector for reducing a manufacture cost by using a projection lens of the liquid crystal projector as a photographing lens, making it more slim and compact, and reducing the number of components. <P>SOLUTION: The projection lens of the liquid crystal projector is also used as the photographing lens 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mobile phone device incorporating a three-plate type liquid crystal projector using three reflective light modulation elements such as a liquid crystal panel.

Conventionally, a device in which a projector is mounted on a small device such as a mobile phone is known (for example, Patent Documents 1 and 2).
JP 2000-236375 A JP 2006-115486 A

  However, the conventional mobile phone device with a projector has to be provided with a lens and a projection lens separately, and the device cannot be made slimmer and smaller.

  Therefore, in the present invention, the projection lens of the liquid crystal projector can also be used as a photographing lens, so that it can be made slimmer and smaller, and the number of parts can be reduced, so that the manufacturing cost can be reduced. An object is to provide a mobile phone device.

  In order to achieve this object, the present invention is characterized in that a liquid crystal projector-equipped mobile phone device in which a projection lens of a liquid crystal projector is also used as a photographing lens.

  According to the present invention, since the projection lens of the liquid crystal projector is also used as a photographing lens, the mobile phone device can be made slimmer and smaller, and the number of components can be reduced, thereby reducing the manufacturing cost. You can also.

Embodiments of the present invention will be described below with reference to the drawings.
<Principle of mobile phone with LCD projector>
1A is an external view when the mobile phone device with a liquid crystal projector according to the present invention is folded, FIG. 1B is an external view when the mobile phone device of FIG. 1A is opened, and FIG. FIG. 2C is a schematic explanatory diagram showing a main optical system inside the mobile phone device of FIG.

  In FIG. 1A, reference numeral 1 denotes a mobile phone device with a liquid crystal projector. The cellular phone device 1 includes a first case (first device main body) 1a and a second case (second device main body) 1b, and the first case 1a and the second case 1b are folded via a hinge shaft 1c. It is provided as possible. The first and second cases 1a and 1b have mating surfaces 1a1 and 1b1 when folded as shown in FIG. The mating surface 1a1 is provided with an operation unit 1a2 having a plurality of operation buttons (reference numerals omitted), and the mating surface 1b1 is provided with a liquid crystal display (liquid crystal display unit, display means) 1b2. Reference numeral 1d denotes an antenna provided in the second case 1b.

  A photographing optical system is provided in the second case 1b. The photographic optical system 2 is provided in the second case 1b as shown in FIG. 1C and the photographic lens 3 held as shown in FIG. 1A on the back surface of the second case (second apparatus main body) 1b. And a CCD (solid-state imaging device) 4 on which a subject projected by the photographing lens 3 is imaged.

  A liquid crystal projector 5 is provided in the second case 1b. The liquid crystal projector 5 includes a liquid crystal on silicon (LCOS) 6 that is a reflective liquid crystal panel, a light source 7 that projects light onto the LCOS 6, and a half mirror 8 that is disposed between the photographing lens 3 and the CCD 4. And a photographic lens 3. The light source 7 is an LD light source.

  Further, the control circuit 9 shown in FIG. 1C is disposed in the first case 1a of FIGS. 1A and 1B, and the control circuit 9 includes the control circuit 9 shown in FIG. The operation of the operation unit 1a2 shown in FIG. The control circuit 9 is configured to select and change the display content of the liquid crystal display 1b2 by operating the operation unit 1a2, and to control other generally known mobile phones. In addition, the control circuit 9 controls the CCD 4, the LCOS 6, the light source 7 and the like by a switching signal by the operation of the operation unit 1 a 2 so as to perform switching control between photographing by the photographing optical system 2 and projection by the liquid crystal projector 5. It has become. This switching operation can be performed using any one or a plurality of combinations of a plurality of operation buttons (reference numerals omitted) of the operation unit 1a2.

  Therefore, by operating the operation unit 1a2, the CCD 4 is turned off by the control circuit 9, and the LCOS 6 is operated by the control circuit 9 and the light source 7 is turned on, so that the illumination light from the light source 7 is projected and reflected on the LCOS 6. The image displayed on the LCOS 6 is reflected by the illumination light from the light source 7 and taken out, and the reflected light of the extracted image is projected onto a projection surface such as a screen outside the mobile phone device via the half mirror 8 and the photographing lens 3. By doing so, an image projected on the LCOS 6 can be projected on the projection surface.

  As the projection plane, a normal screen, a wall or ceiling of a nearby building, or other various planes or objects can be used. In this case, the photographing lens 3 of the mobile phone device functions as a projection lens. Therefore, it is possible to enlarge and project a movie downloaded by the mobile phone device, a photograph taken, a moving image or the like on the screen.

  In addition, the CCD 4 is turned on by the control circuit 9 by the operation of the operation unit 1a2, and the LCOS 6 and the light source 7 are turned off by the control circuit 9, so that the subject imaged on the CCD 4 through the photographing lens 3 is imaged by the CCD 4. Then, it can be displayed on the liquid crystal display 1b2.

  Note that LCOS (Liquid Crystal On Silicon) 6 represents a main optical system of the liquid crystal projector 5 and refers to a reflective liquid crystal display panel that displays liquid crystal on a silicon substrate by reflecting light.

  Note that a wide-angle lens of 90 degrees or more is used as the projection lens that is also used as the photographing lens 3. Moreover, it is not limited to this, For example, it is desirable to use the super wide-angle lens of 120 to 180 degrees as the photographing lens 3.

  FIG. 2 shows a main optical system of the color liquid crystal projector main body 10 used in place of the LCOS 6 and the light source 7 of the liquid crystal projector 5 of FIG.

  The color liquid crystal projector main body 10 includes a white light source (not shown) and a dichroic prism 11 on which illumination light from the white light source is incident. White illuminating light from a white light source is incident on the dichroic prism 11 as indicated by an arrow A1. Moreover, the white light is incident on the dichroic prism 11 in an S-polarized state.

  For this white light source, a semiconductor laser that emits white illumination light is used. However, the white light source is not limited to this semiconductor laser, and may be an LED, a halogen lamp, or the like.

  Further, the dichroic prism 11 reflects the red light out of the three primary colors of white light red light, blue light and green light as indicated by the arrow A2, and also reflects the S-polarized blue light light. As shown by arrow A3, it has the joint surface (coating surface) 11a to reflect. Further, the joint surface 11a of the dichroic prism 11 transmits S-polarized green light as indicated by an arrow A4.

  The color liquid crystal projector main body 10 includes three PBSs (Polarization beam splitters), that is, a first polarizing beam splitter 12 for blue and red, and a first polarizing beam splitter 12 for green. It has a two-polarization beam splitter 13 and a third polarization beam splitter 14 on the exit side. In addition, the color liquid crystal projector main body 10 includes a first laminated phase plate (first polarizing plate) 15 for rotating the blue wavelength and a second laminated phase plate for rotating the blue wavelength (first polarizing plate). 2 polarizing plate) 16, a laminated phase plate (third polarizing plate) 17 for rotating green wavelength, and a ¼ wavelength plate (fourth polarizing plate) 18.

  Further, the color liquid crystal projector body 10 includes three LCOS (Liquid Crystal On Silicon, reflective liquid crystal panel), that is, a blue light liquid crystal panel 19, a green light liquid crystal panel 20, and a red light. (Red) The liquid crystal panel 21 for light is included.

  The red light and blue light reflected by the dichroic prism 11 are incident on the laminated phase plate 15. The laminated phase plate 15 transmits a red light of two colors in an S-polarized state as indicated by an arrow A3, and converts a blue light from an S-polarized light to a P-polarized light (not shown) and a phase plate. It is the structure which laminated | stacked. Since this laminated phase plate 15 can have a well-known structure, its detailed description is omitted.

  The red light and the blue light transmitted through the laminated phase plate 15 are incident on the first polarization beam splitter 12. The first polarizing beam splitter 12 reflects the red light transmitted through the laminated phase plate 15 in the S-polarized state as indicated by the arrow A5, and the blue light that has been P-polarized is indicated by the arrow A6. Thus, it has the joint surface (coating surface) 12a which permeates.

  The blue light transmitted through the first polarizing beam splitter 12 is incident on the blue light liquid crystal panel 19 and reflected by the blue light liquid crystal panel 19. At this time, the blue light reflects the image of the blue light liquid crystal panel 19 and is S-polarized by the blue light liquid crystal panel 19 and enters the first polarizing beam splitter 12 as indicated by an arrow A7. ing.

  On the other hand, the red light reflected by the first polarizing beam splitter 12 enters the red light liquid crystal panel 21 and is reflected by the red light liquid crystal panel 21. At this time, the red light reflects the image of the liquid crystal panel 21 for red light, is P-polarized by the liquid crystal panel 21 for red light, and enters the first polarizing beam splitter 12 as indicated by an arrow A8. It has become.

  Then, the S-polarized blue light incident on the first polarizing beam splitter 12 as indicated by the arrow A7 is reflected by the joint surface 12a as indicated by the arrow A9, and is incident on the first polarizing beam splitter 12 as indicated by the arrow A8. The red light passes through the joint surface 12a as indicated by an arrow A10.

  The blue light reflected by the first polarizing beam splitter 12 and the red light transmitted through the first polarizing beam splitter 12 are incident on the second laminated phase plate 16 for rotating the blue wavelength. The second laminated phase plate 16 is a filter (not shown) that transmits red light of two colors in the P-polarized state as indicated by an arrow A10 and converts blue light from S-polarized light to P-polarized light. And a phase plate are laminated. Since the laminated phase plate 16 can be of a known structure, a detailed description thereof will be omitted.

  The red light transmitted through the second laminated phase plate 16 in the P-polarized state enters the third polarizing beam splitter 14 as indicated by the arrow A10 and is P-polarized by the second laminated phase plate 16. Blue light is incident on the third polarizing beam splitter 14 by an arrow A11. Moreover, the P-polarized red light and blue light incident on the third polarizing beam splitter 14 pass through the joint surface (coating surface) 14a of the third polarizing beam splitter 14 as indicated by arrows A10 and A11. It has become.

  Further, the green light transmitted through the dichroic prism 11 in the S-polarized state enters the second polarization beam splitter 13 as indicated by an arrow A4. The second polarizing beam splitter 13 has a bonding surface (coating surface) 13a that reflects the incident S-polarized green light as indicated by an arrow A12. The green light reflected by the joint surface 13 a of the second polarizing beam splitter 13 is incident on the green light liquid crystal panel 20. At this time, the green light reflects the image of the green light liquid crystal panel 20 and is P-polarized by the green light liquid crystal panel 20 and enters the second polarizing beam splitter 13 as indicated by an arrow A13. ing.

  The P-polarized green light incident on the second polarizing beam splitter 13 passes through the joint surface 13a of the second polarizing beam splitter 13 and enters the laminated phase plate 17 for rotating the green wavelength. The laminated phase plate 17 for rotating the green wavelength causes the incident P-polarized green light to be S-polarized and incident on the third polarization beam splitter 14 as indicated by an arrow A14. The third polarizing beam splitter 14 has a joint surface (coating surface) 14a that reflects S-polarized green light as indicated by an arrow A15.

  Then, the P-polarized (linearly polarized) red light and the blue light and the green light reflected by the S-polarized (linearly polarized) bonded surface 14a transmitted through the bonding surface 14a are transmitted through the quarter-wave plate 18. To do. At this time, the quarter-wave plate 18 combines the linearly polarized red light, blue light, and green light by circularly polarizing, and emits the luminous flux of the combined image by color as indicated by the arrow A16. The luminous flux of the composite image in color is projected onto a screen or the like (not shown) through the half mirror 8 and the photographing lens 3 shown in FIG.

  As described above, according to the present invention, since the projection lens of the liquid crystal projector 5 is also used as the photographing lens 3, the mobile phone device can be made slimmer and smaller, and the number of components can be reduced. Cost can also be reduced.

  The optical system of the liquid crystal projector of the mobile phone device with a liquid crystal projector of the present invention can naturally be used as a liquid crystal projector device.

  In addition, since it is equipped with an ultra-wide-angle lens, it can be mounted on a car as an in-vehicle camera, and by connecting the in-vehicle LAN cable to a mobile phone, the state of the car window can be photographed and stored in the video memory of the mobile phone. .

  Further, as described above, in the mobile phone device with a liquid crystal projector according to the embodiment of the present invention, the projection lens of the liquid crystal projector 5 is also used as the photographing lens 3. That is, in the mobile phone device with a liquid crystal projector, the photographing lens 3 of the mobile phone is also used as the projection lens of the liquid crystal projector 5.

According to this configuration, since the projection lens of the liquid crystal projector 5 and the photographing lens 3 of the mobile phone are used together, even if the liquid crystal projector 5 is incorporated in the mobile phone device, the projection lens of the liquid crystal projector 5 and the photographing lens 3 of the mobile phone. The mobile phone device can be made slimmer and smaller than the mobile phone device provided separately, and the manufacturing cost can be reduced by reducing the number of parts.
In the mobile phone device with a liquid crystal projector according to the embodiment of the present invention, the projection lens that is also used as the photographing lens 3 is a wide-angle lens of 90 degrees or more. According to this configuration, when a mobile phone device with a liquid crystal projector is used as an in-vehicle camera, it is mounted on a car and connected to the mobile phone with an in-vehicle LAN cable to capture the state of the car window and save it in the video memory of the mobile phone. You can also

  Furthermore, in the mobile phone device with a projector according to the embodiment of the present invention, the liquid crystal projector makes S-polarized white light emitted from a light source incident on the dichroic prism 11. Of the three primary colors of white light, red, blue, and green, red and blue light is reflected by the dichroic prism 11 and green light is transmitted by the dichroic prism 11. Also, blue light of two colors of red and blue reflected by the dichroic prism 11 is converted from S-polarized light to P-polarized light by the first polarizing plate (laminated phase plate 15) and reflected by the dichroic prism 11. Of the two colors, red and blue, red light is transmitted through the first polarizing plate (laminated phase plate 15) in the state of S-polarized light. Furthermore, the S-polarized light that has been transmitted through the first polarizing beam splitter 12 and transmitted through the first polarizing plate (laminated phase plate 15) is blue light that has been converted to P-polarized light by the first polarizing plate (laminated phase plate 15). The red light is reflected by the first polarization beam splitter 12. Further, when the light is incident on the red reflective liquid crystal panel 21 reflected by the first polarizing beam splitter 15 and is reflected by the red reflective liquid crystal panel 21, the light is converted from S-polarized light to P-polarized light. In addition, when the blue light transmitted through the first polarizing beam splitter 15 is incident on the blue reflective liquid crystal panel 19 and reflected by the blue reflective liquid crystal panel 19, it is converted from P-polarized light to S-polarized light. . Further, the red light converted into P-polarized light by the red reflective liquid crystal panel 21 is transmitted through the first polarizing beam splitter 15 and the blue light is converted into S-polarized light by the blue reflective liquid crystal panel 19. Light is reflected by the first polarizing beam splitter 15. The red light transmitted through the first polarizing beam splitter 15 is transmitted through the second polarizing plate (laminated phase plate 16) in the P-polarized state and reflected by the first polarizing beam splitter 15. Is converted to P-polarized light by the second polarizing plate (laminated phase plate 16). In addition, the S-polarized green light transmitted through the dichroic prism 11 is reflected by the second polarizing beam splitter 13. Further, when the green light is incident on and reflected by the green reflective liquid crystal panel 20 and reflected by the green reflective liquid crystal panel 20, the green light is converted from S-polarized light to P-polarized light. The light is transmitted through the second polarizing beam splitter 13 and converted from P-polarized light to S-polarized light by the third polarizing plate (laminated phase plate 17). Then, the P-polarized red light transmitted through the second polarizing plate (laminated phase plate 16) and the blue light converted into P-polarized light by the second polarizing plate (laminated phase plate 16) are converted into a third polarizing beam splitter. 14, and the green light converted to S-polarized light by the third polarizing plate (laminated phase plate 17) is reflected by the third polarizing beam splitter 14. Further, P-polarized red light and blue light that are linearly polarized light transmitted through the third polarized beam splitter 14 and S-polarized green light that is linearly polarized light reflected by the third polarized beam splitter 14 are converted into a fourth polarizing plate. The light is converted into circularly polarized light by a (¼ wavelength plate) and synthesized.

  According to this configuration, a color liquid crystal projector can be incorporated into a mobile phone with a simple configuration.

  In the mobile phone with a projector according to the embodiment of the present invention, the liquid crystal projector 5 includes a white light source (not shown) that emits S-polarized white light, and red light, blue light, and green light of the white light. Of the three primary colors of light, dichroic prism 11 that reflects two colors of red and blue light and transmits green light, and blue light reflected by dichroic prism 11 is converted from S-polarized light to P-polarized light. In addition, a first polarizing plate (laminated phase plate 15) that transmits the red light reflected by the dichroic prism 11 in an S-polarized state. Further, the liquid crystal projector 5 reflects the S-polarized red light transmitted through the first polarizing plate (laminated phase plate 15) and the P-polarized blue light by the first polarizing plate (laminated phase plate 15). The first polarization beam splitter 12 transmits the light. Further, the liquid crystal projector 5 receives red light that is reflected by the first polarizing beam splitter 12 and causes the red light to pass through the first polarizing beam splitter 12 by being P-polarized when the incident red light is reflected. A reflective liquid crystal panel 21 and a blue reflective liquid crystal panel 19 that reflects blue light transmitted through the first polarizing beam splitter 12 and reflects blue light to be reflected by the first polarizing beam splitter 12 are reflected. . The liquid crystal projector 5 converts the blue light reflected by the first polarizing beam splitter 12 from S-polarized light to P-polarized light, and transmits the red light transmitted through the first polarizing beam splitter 12 in the P-changed state. A polarizing plate (laminated phase plate 16) is included. In addition, the liquid crystal projector 5 receives the second polarized beam splitter 13 that reflects the green light transmitted through the dichroic prism 11 and the green light reflected by the second polarized beam splitter 13 and reflects the incident green light. A green reflective liquid crystal panel 20 that is P-polarized and transmitted through the second polarizing beam splitter 13 and a third polarizing plate that converts green light transmitted through the second polarizing beam splitter 13 from P-polarized light to S-polarized light. (Laminated phase plate 17). The liquid crystal projector 5 transmits P-polarized red light and blue light transmitted through the second polarizing plate (laminated phase plate 16) and transmitted through the third polarizing plate (laminated phase plate 17). A third polarization beam splitter 14 that reflects polarized green light, and P-polarized red light, blue light, and S-polarized green light emitted from the third polarization beam splitter 14 from linearly polarized P-polarized light and S-polarized light. It has the 4th polarizing plate (1/4 wavelength plate 18) synthesize | combined by converting into circularly polarized light.

  According to this configuration, a color liquid crystal projector can be incorporated into a mobile phone with a simple configuration.

  Furthermore, in the cellular phone device with a liquid crystal projector according to the embodiment of the present invention, the light source that outputs the white light is a semiconductor laser.

  According to this configuration, the light source of the color liquid crystal projector can be made small with a simple configuration.

(A) is an external view when the mobile phone device with a liquid crystal projector according to the present invention is folded, (b) is an external view when the mobile phone device of (a) is opened, and (c) is a mobile phone of (a). It is a schematic explanatory drawing which shows the main optical systems inside a telephone apparatus. 1 shows an enlarged view of a liquid crystal projector optical system of a mobile phone device with a liquid crystal projector according to the present invention. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cell-phone apparatus 2 ... Shooting optical system 5 ... Liquid crystal projector 10 ... Color liquid crystal projector main body 11 ... Dichroic prism 12 ... 1st polarization beam splitter 13 ... 2nd polarization Beam splitter 14 ... third polarizing beam splitter 15 ... laminated phase plate (first polarizing plate)
16 ... Laminated phase plate (second polarizing plate)
17 ... Laminated phase plate (third polarizing plate)
18. ・ ¼ wave plate (fourth polarizing plate)
19: Blue reflective liquid crystal panel 20 ... Green reflective liquid crystal panel 21 ... Red reflective liquid crystal panel

Claims (5)

  A mobile phone device with a liquid crystal projector, wherein the projection lens of the liquid crystal projector is also used as a photographing lens. The mobile phone device with a liquid crystal projector according to claim 1,
A mobile phone device with a liquid crystal projector, wherein a projection lens that is also used as a photographing lens is a wide-angle lens of 90 degrees or more. In the mobile telephone apparatus with a projector of any one of Claim 1 or 2,
The liquid crystal projector is
S-polarized white light emitted from a light source is incident on a dichroic prism, and two of the three primary colors red, blue and green of the white light are reflected by the dichroic prism and the dichroic prism is reflected. Of red and blue reflected by the dichroic prism, the blue light is converted from S-polarized light to P-polarized light by the first polarizing plate, and reflected by the dichroic prism. Of the two blue colors, red light is transmitted through the first polarizing plate in the S-polarized state, blue light that has been converted to P-polarized light by the first polarizing plate is transmitted through the first polarizing beam splitter, and the first polarizing plate is used. S-polarized red light that has passed through is reflected by the first polarizing beam splitter and enters the red reflective liquid crystal panel reflected by the first polarizing beam splitter. When the red reflective liquid crystal panel reflects the light, it converts the S-polarized light into the P-polarized light, and transmits the blue light transmitted through the first polarizing beam splitter to the blue reflective liquid crystal panel, thereby reflecting the blue reflective liquid crystal. When the light is reflected by the panel, it is converted from P-polarized light to S-polarized light, the red light converted to P-polarized light by the red reflective liquid crystal panel is transmitted through the first polarizing beam splitter, and the blue light is reflected by blue light. The blue light converted into S-polarized light by the liquid crystal panel is reflected by the first polarizing beam splitter, the red light transmitted through the first polarizing beam splitter is transmitted through the second polarizing plate in the P-polarized state, and the first light is transmitted. The S-polarized blue light reflected by the polarizing beam splitter is converted to P-polarized light by the second polarizing plate, and the S-polarized green light transmitted through the dichroic prism is converted to the second polarized beam split. When the green light is reflected by the green reflective liquid crystal panel, the green light is converted from S-polarized light to P-polarized light. The light is transmitted through the second polarizing beam splitter, converted from P-polarized light to S-polarized light by the third polarizing plate, converted into P-polarized light by the P-polarized red light transmitted through the second polarizing plate and the second polarizing plate. Linearly polarized light that passes through the third polarizing beam splitter, transmits green light that is transmitted through the third polarizing beam splitter, is reflected by the third polarizing plate into S-polarized light, is reflected by the third polarizing beam splitter, and is transmitted through the third polarizing beam splitter. P-polarized red light and blue light and S-polarized green light, which is linearly polarized light reflected by the third polarizing beam splitter, are converted into circularly polarized light by a fourth polarizing plate and synthesized. projector With mobile phone. In the mobile telephone apparatus with a projector of any one of Claim 1 or 2,
The liquid crystal projector is
A white light source for emitting S-polarized white light;
A dichroic prism that reflects two colors of red light and blue light among the three primary colors of red light, blue light, and green light, and transmits green light;
A first polarizing plate that converts blue light reflected by the dichroic prism from S-polarized light to P-polarized light and transmits the red light reflected by the dichroic prism in an S-polarized state;
A first polarization beam splitter that reflects S-polarized red light transmitted through the first polarizing plate and transmits P-polarized blue light by the first polarizing plate;
A red reflective liquid crystal panel that receives red light reflected by the first polarizing beam splitter and reflects the incident red light to be P-polarized and transmitted through the first polarizing beam splitter;
A blue reflective liquid crystal panel that reflects blue light transmitted through the first polarizing beam splitter and reflects the reflected blue light as S-polarized light by the first polarizing beam splitter;
A second polarizing plate that converts blue light reflected by the first polarizing beam splitter from S-polarized light to P-polarized light and transmits red light transmitted through the first polarizing beam splitter in a P-change state;
A second polarizing beam splitter that reflects the green light transmitted through the dichroic prism;
A green reflective liquid crystal panel that receives green light reflected by the second polarizing beam splitter and reflects the incident green light to P-polarized light and transmits the second polarizing beam splitter;
A third polarizing plate for changing green light transmitted through the second polarizing beam splitter from P-polarized light to S-polarized light;
A third polarizing beam splitter that transmits P-polarized red light and blue light transmitted through the second polarizing plate and reflects S-polarized green light transmitted through the third polarizing plate;
A fourth polarizing plate that converts P-polarized red light, blue light, and S-polarized green light emitted from the third polarizing beam splitter from linearly polarized P-polarized light and S-polarized light into circularly-polarized light; A mobile phone device with a liquid crystal projector. In the mobile telephone apparatus with a liquid crystal projector of any one of Claims 1-4,
A mobile phone device with a liquid crystal projector, wherein the light source for outputting white light is a semiconductor laser.

Images